数据与计算发展前沿 ›› 2025, Vol. 7 ›› Issue (6): 44-54.

CSTR: 32002.14.jfdc.CN10-1649/TP.2025.06.005

doi: 10.11871/jfdc.issn.2096-742X.2025.06.005

• 专刊：第40次全国计算机安全学术交流会征文 • 上一篇    下一篇

未知CSI下双RIS的多用户多窃听者安全传输方法

陈新武1,2,*(),韩帅2   

  1. 1.辽宁省人民检察院，辽宁 沈阳 110033
    2.哈尔滨工业大学，黑龙江 哈尔滨 150001
  • 收稿日期:2025-07-25 出版日期:2025-12-20 发布日期:2025-12-17
  • 通讯作者: 陈新武
  • 作者简介:陈新武，博士，辽宁省人民检察院，主要研究方向为无线通信，通信安全，卫星遥感。
    本文承担工作为模型设计，模型算法实现，论文撰写。
    CHEN Xinwu, Ph.D., is with The People’s Procuratorate of Liaoning Province. His main research interests include wireless communications, communication security, and satellite remote sensing.
    In this paper, he is mainly responsible for model design, model algorithm realization and content writing.
    E-mail: cxw808@qq.com
  • 基金资助:
    国家自然科学基金区域联合基金(U21A20444)

Secure Transmission Method for Multi-User Multi-Eavesdropper Systems Under Unknown CSI with Double-RIS

CHEN Xinwu1,2,*(),HAN Shuai2   

  1. 1. The People’s Procuratorate of Liaoning Province, Shenyang, Liaoning 110033, China
    2. Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
  • Received:2025-07-25 Online:2025-12-20 Published:2025-12-17
  • Contact: CHEN Xinwu

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摘要：

【目的】研究在未知信道状态信息场景中，双可重构智能表面辅助下的通信安全。【方法】通过最小化RIS反射功率并确保合法用户速率的前提下，将剩余的功率用于在合法用户信道的零空间中生成人工噪声，以此来增强系统保密性。【结果】多用户的双RIS系统在相同功率条件下，比单RIS系统具有更大的保密速率。【结论】仿真结果验证了多用户的双RIS系统在提升通信链路安全性方面的优势，优于单RIS系统，提供强大的防窃听防御，该技术可为智慧检务应用中的无线通信保密提供技术支撑。

关键词: 双RIS, 无线通信, 人工噪声, 物理层安全, 智慧检务

Abstract:

[Objective] This study investigates communication security in double-reconfigurable intelligent surface (RIS) assisted systems under unknown channel state information (CSI) conditions. [Methods] System secrecy is enhanced by allocating residual power to artificial noise generation in legitimate users’ channel null spaces, subject to RIS reflection power minimization while guaranteeing user data rates. [Results] Under identical power constraints, the double-RIS system achieves a higher secrecy rate than its single-RIS counterpart for multiple users. [Conclusions] Simulation results demonstrate the superiority of the double-RIS system over its single-RIS counterpart in enhancing communication link security for multiple users, providing robust eavesdropping protection. This technology establishes a technical foundation for securing wireless communications in Chinese Smart Procuratorate Project.

Key words: double-reconfigurable intelligent surface, wireless communications, artificial noise, physical layer security, Smart Procuratorate Project